The book is available as a Director's Score or Singer's Edition and each is broken into three sections: Part I provides an introduction to preparing Messiah and highlights Baroque performance practice and ideals, practical considerations for the performance and other helpful information. Part II includes warm-ups for 20 choruses. Part III includes appendices with a historical context of Messiah, primary sources supporting Baroque style and expression and a recommended reading list. The Director's Score includes the full text and warm-ups with Piano accompaniments, along with a code for accessing downloadable singer parts online. The Singer's Edition includes a handy folder-sized print edition of the vocal warm-ups.